JAVA one or more spaces split string

Knowledge Supplement

1. The split method of string supports regular expressions;

2. The regular expression \s represents any white space character that matches + one or more occurrences.

With the above supplementary knowledge, the following content is very well understood.

A. String to be split

The string to be split is as follows:

str = "a  b     c  d e f      g"

Where the whitespace in the string is: a single space, multiple Spaces, tab tabs.

Second, use one or more spaces to split the string

The correct code is as follows:

String [] arr = str.split("\\s+");for(String ss : arr){ System.out.println(ss);}

As a comparison, the error code is as follows:

String [] arr2 = str.split(" ");for(String ss : arr2){ System.out.println(ss);}

Third, the result of segmentation

To split the result with the correct code:

abcdefg

To split the result with an error code:

abcdefg
四：编写的程序

     Public Static void Main (String args[]) {        = "good12 morning34 good56 night78";         // The output        of the array after the split of string String[] Tt=line.split ("\\s+");          for (String s:tt)        {            System.out.println (s);        }        System.out.println ("#####");}

The output result is
Good12
Morning34
Good56
night78

 

JAVA one or more spaces split string